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451 lines
8.5 KiB
451 lines
8.5 KiB
package tencentdb
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/**
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* 事务操作
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*/
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import (
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"database/sql"
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"errors"
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"log"
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"strconv"
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"strings"
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)
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type TxQuery struct {
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dbname string
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table string
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alias string
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title string
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where []string
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where_or []string
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join [][]string //[["tablea as a","a.id=b.id","left"]]
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data []string
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value []interface{}
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orderby string
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page int
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page_size int
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stmt *sql.Stmt
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conn *sql.DB
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tx *sql.Tx
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debug bool
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}
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func NewTxQuery(t ...string) *TxQuery {
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var conn_type *sql.DB = DB
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tx, err := conn_type.Begin()
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if err != nil {
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log.Println("start tx begin error", err)
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}
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return &TxQuery{
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conn: conn_type,
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tx: tx,
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}
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}
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func (this *TxQuery) Conn(conn *sql.DB) *TxQuery {
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this.conn = conn
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return this
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}
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func (this *TxQuery) Db(dbname string) *TxQuery {
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this.dbname = dbname
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return this
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}
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func (this *TxQuery) Table(tablename string) *TxQuery {
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this.table = tablename
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return this
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}
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func (this *TxQuery) Alias(tablename string) *TxQuery {
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this.alias = tablename
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return this
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}
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func (this *TxQuery) Title(title string) *TxQuery {
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this.title = title
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return this
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}
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func (this *TxQuery) Page(page int) *TxQuery {
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this.page = page
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return this
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}
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func (this *TxQuery) PageSize(page_num int) *TxQuery {
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this.page_size = page_num
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return this
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}
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func (this *TxQuery) Orderby(orderby string) *TxQuery {
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this.orderby = orderby
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return this
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}
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func (this *TxQuery) Where(where string) *TxQuery {
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this.where = append(this.where, where)
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return this
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}
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func (this *TxQuery) Wheres(wheres []string) *TxQuery {
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if len(wheres) > 0 {
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this.where = append(this.where, wheres...)
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}
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return this
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}
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func (this *TxQuery) WhereOr(where string) *TxQuery {
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this.where_or = append(this.where_or, where)
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return this
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}
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func (this *TxQuery) Value(value interface{}) *TxQuery {
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this.value = append(this.value, value)
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return this
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}
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func (this *TxQuery) Values(values []interface{}) *TxQuery {
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this.value = append(this.value, values...)
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return this
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}
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func (this *TxQuery) Join(join []string) *TxQuery {
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this.join = append(this.join, join)
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return this
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}
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func (this *TxQuery) Data(data string) *TxQuery {
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this.data = append(this.data, data)
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return this
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}
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func (this *TxQuery) Datas(datas []string) *TxQuery {
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this.data = append(this.data, datas...)
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return this
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}
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func (this *TxQuery) Debug(debug bool) *TxQuery {
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this.debug = debug
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return this
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}
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/*
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* 清理上次查询
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*/
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func (this *TxQuery) Clean() *TxQuery {
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this.title = ""
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this.where = this.where[0:0]
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this.where_or = this.where_or[0:0]
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this.join = this.join[0:0]
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this.data = this.data[0:0]
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this.value = this.value[0:0]
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this.orderby = ""
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this.page = 0
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this.page_size = 0
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return this
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}
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// 拼查询sql
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func (this *TxQuery) QueryStmt() error {
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if this.dbname == "" && this.table == "" {
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return errors.New("参数错误，没有数据表")
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}
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table := getTableName(this.dbname, this.table)
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var sql, title string
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if this.title != "" {
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title = this.title
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} else {
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title = "*"
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}
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sql = StringJoin("select ", title)
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if this.alias != "" {
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table = StringJoin(table, " as ", this.alias)
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}
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sql = StringJoin(sql, " from ", table)
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if len(this.join) > 0 {
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for _, joinitem := range this.join {
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if len(joinitem) < 2 {
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continue
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}
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if len(joinitem) == 3 {
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sql = StringJoin(sql, " ", joinitem[2], " join ", getTableName(this.dbname, joinitem[0]), " on ", joinitem[1])
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} else { //默认左连接
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sql = StringJoin(sql, " left join ", getTableName(this.dbname, joinitem[0]), " on ", joinitem[1])
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}
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}
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}
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if len(this.where) > 0 || len(this.where_or) > 0 {
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sql = StringJoin(sql, " where ")
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}
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if len(this.where) > 0 {
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sql = StringJoin(sql, " (", strings.Join(this.where, " and "), " ) ")
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}
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if len(this.where_or) > 0 {
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if len(this.where) > 0 {
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sql = StringJoin(sql, " or ", strings.Join(this.where_or, " or "))
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} else {
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sql = StringJoin(sql, strings.Join(this.where_or, " or "))
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}
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}
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if this.orderby != "" {
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sql = StringJoin(sql, " order by ", this.orderby)
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}
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if this.page > 0 || this.page_size > 0 {
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if this.page < 1 {
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this.page = 1
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}
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if this.page_size < 1 {
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this.page_size = 10
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}
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from := strconv.Itoa((this.page - 1) * this.page_size)
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offset := strconv.Itoa(this.page_size)
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if from != "" && offset != "" {
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sql = StringJoin(sql, " limit ", from, " , ", offset)
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}
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}
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if this.debug {
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log.Println("query sql:", sql, this.value)
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}
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condition_len := 0 //所有条件数
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for _, ch2 := range sql {
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if string(ch2) == "?" {
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condition_len++
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}
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}
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if condition_len != len(this.value) {
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return errors.New("参数错误，条件值错误")
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}
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stmt, err = this.tx.Prepare(sql + " FOR UPDATE")
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if err != nil {
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return err
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}
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this.stmt = stmt
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return nil
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}
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// 拼更新sql
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func (this *TxQuery) UpdateStmt() error {
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if this.dbname == "" && this.table == "" {
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return errors.New("参数错误，没有数据表")
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}
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if len(this.where) < 1 {
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return errors.New("参数错误，缺少条件")
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}
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dbName := getTableName(this.dbname, this.table)
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var sql string
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sql = StringJoin("update ", dbName, " set ", strings.Join(this.data, " , "))
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sql = StringJoin(sql, " where ", strings.Join(this.where, " and "))
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if this.debug {
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log.Println("update sql:", sql, this.value)
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}
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condition_len := 0 //所有条件数
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for _, ch2 := range sql {
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if string(ch2) == "?" {
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condition_len++
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}
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}
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if condition_len != len(this.value) {
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return errors.New("参数错误，条件值错误")
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}
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stmt, err = this.tx.Prepare(sql)
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if err != nil {
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return err
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}
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this.stmt = stmt
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return nil
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}
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// 拼插入sql
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func (this *TxQuery) CreateStmt() error {
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if this.dbname == "" && this.table == "" {
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return errors.New("参数错误，没有数据表")
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}
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dbName := getTableName(this.dbname, this.table)
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var sql string
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sql = StringJoin("insert into ", dbName, " set ", strings.Join(this.data, " , "))
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if this.debug {
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log.Println("insert sql:", sql, this.value)
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}
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condition_len := 0 //所有条件数
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for _, ch2 := range sql {
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if string(ch2) == "?" {
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condition_len++
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}
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}
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if condition_len != len(this.value) {
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return errors.New("参数错误，条件值错误")
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}
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stmt, err = this.tx.Prepare(sql)
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if err != nil {
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return err
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}
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this.stmt = stmt
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return nil
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}
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// 拼删除sql
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func (this *TxQuery) DeleteStmt() error {
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if this.dbname == "" && this.table == "" {
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return errors.New("参数错误，没有数据表")
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}
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if len(this.where) < 1 {
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return errors.New("参数错误，缺少条件")
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}
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dbName := getTableName(this.dbname, this.table)
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var sql string
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sql = StringJoin("delete from ", dbName, " where ", strings.Join(this.where, " and "))
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if this.page_size > 0 {
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sql = StringJoin(sql, " limit ", strconv.Itoa(this.page_size))
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}
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if this.debug {
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log.Println("delete sql:", sql, this.value)
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}
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condition_len := 0 //所有条件数
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for _, ch2 := range sql {
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if string(ch2) == "?" {
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condition_len++
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}
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}
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if condition_len != len(this.value) {
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return errors.New("参数错误，条件值错误")
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}
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stmt, err = this.tx.Prepare(sql)
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if err != nil {
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return err
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}
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this.stmt = stmt
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return nil
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}
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/**
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* 执行查询列表
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* return list error
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*/
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func (this *TxQuery) Select() ([]map[string]string, error) {
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err := this.QueryStmt()
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if err != nil {
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return []map[string]string{}, err
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}
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if this.stmt == nil {
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return []map[string]string{}, errors.New("缺少必要参数")
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}
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return StmtForQueryList(this.stmt, this.value)
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}
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/**
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* 执行查询一条数据
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* return row error
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*/
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func (this *TxQuery) Find() (map[string]string, error) {
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this.page = 1
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this.page_size = 1
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err := this.QueryStmt()
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if err != nil {
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return map[string]string{}, err
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}
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if this.stmt == nil {
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return nil, errors.New("缺少必要参数")
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}
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return StmtForQueryRow(this.stmt, this.value)
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}
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/**
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* 执行更新
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* return is_updated error
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*/
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func (this *TxQuery) Update() (int64, error) {
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err := this.UpdateStmt()
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if err != nil {
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return 0, err
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}
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return StmtForUpdateExec(this.stmt, this.value)
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}
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/**
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* 执行删除
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* return is_delete error
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*/
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func (this *TxQuery) Delete() (int64, error) {
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err := this.DeleteStmt()
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if err != nil {
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return 0, err
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}
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return StmtForUpdateExec(this.stmt, this.value)
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}
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/**
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* 执行写入
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* return is_insert error
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*/
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func (this *TxQuery) Create() (int64, error) {
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err := this.CreateStmt()
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if err != nil {
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return 0, err
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}
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return StmtForInsertExec(this.stmt, this.value)
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}
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/**
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* 提交
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*/
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func (this *TxQuery) Commit() error {
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return this.tx.Commit()
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}
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/**
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* 回滚
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*/
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func (this *TxQuery) Rollback() error {
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return this.tx.Rollback()
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}
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